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Question 1

Ident

Answer 1

Air Traffic Control request for a pilot to push
the button on the transponder to identify return on the
controller’s scope.

Question 2

ILS categories

Answer 2

Categories of instrument approach
procedures allowed at airports equipped with the following
types of instrument landing systems:

Question 3

ILS Category I

Answer 3

Provides for approach to a height
above touchdown of not less than 200 feet, and with
runway visual range of not less than 1,800 feet

Question 4

ILS Category II

Answer 4

Provides for approach to a height
above touchdown of not less than 100 feet and with
runway visual range of not less than 1,200 feet

Question 5

ILS Category IIA

Answer 5

Provides for approach without
a decision height minimum and with runway visual
range of not less than 700 feet.

Question 6

ILS Category IIIB

Answer 6

Provides for approach without
a decision height minimum and with runway visual
range of not less than 150 feet.

Question 7

ILS Category IIIC

Answer 7

Provides for approach without a
decision height minimum and without runway visual
range minimum.

Question 8

Inclinometer

Answer 8

An instrument consisting of a curved glass
tube, housing a glass ball, and damped with a fluid similar
to kerosene. It may be used to indicate inclination, as a level,
or, as used in the turn indicators, to show the relationship
between gravity and centrifugal force in a turn.

Question 9

Indicated airspeed (IAS)

Answer 9

Shown on the dial of the
instrument airspeed indicator on an aircraft. Indicated
airspeed (IAS) is the airspeed indicator reading uncorrected
for instrument, position, and other errors. Indicated airspeed
means the speed of an aircraft as shown on its pitot static
airspeed indicator calibrated to reflect standard atmosphere
adiabatic compressible flow at sea level uncorrected for
airspeed system errors. Calibrated airspeed (CAS) is IAS
corrected for instrument errors, position error (due to
incorrect pressure at the static port) and installation errors.

Question 10

Indicated altitude

Answer 10

The altitude read directly from the
altimeter (uncorrected) when it is set to the current altimeter
setting.

Question 11

Indirect indication

Answer 11

A reflection of aircraft pitch-and-bank

attitude by instruments other than the attitude indicator

Question 12

Induced drag

Answer 12

Drag caused by the same factors that produce
lift; its amount varies inversely with airspeed. As airspeed
decreases, the angle of attack must increase, in turn increasing
induced drag.

Question 13

Induction icing

Answer 13

A type of ice in the induction system that
reduces the amount of air available for combustion. The most
commonly found induction icing is carburetor icing.

Question 14

Inertial Navigation System (INS)

Answer 14

A computer-based
navigation system that tracks the movement of an aircraft
via signals produced by onboard accelerometers. The initial G-16
location of the aircraft is entered into the computer, and all
subsequent movement of the aircraft is sensed and used to
keep the position updated. An INS does not require any inputs
from outside signals.

Question 15

Initial Approach Fix (IAF)

Answer 15

The fix depicted on IAP charts
where the instrument approach procedure (IAP) begins unless
otherwise authorized by ATC.

Question 16

Inoperative components

Answer 16

Higher minimums are prescribed
when the specified visual aids are not functioning; this
information is listed in the Inoperative Components Table found
in the United States Terminal Procedures Publications.

Question 17

Instantaneous Vertical Speed Indicator (IVSI)

Answer 17

Assists in
interpretation by instantaneously indicating the rate of climb
or descent at a given moment with little or no lag as displayed
in a vertical speed indicator (VSI).

Question 18

Instrument Approach Procedures (IAP)

Answer 18

A series of
predetermined maneuvers for the orderly transfer of an
aircraft under IFR from the beginning of the initial approach
to a landing or to a point from which a landing may be
made visually.

Question 19

Instrument Flight Rules (IFR)

Answer 19

Rules and regulations
established by the Federal Aviation Administration to govern
flight under conditions in which flight by outside visual
reference is not safe. IFR flight depends upon flying by
reference to instruments in the flight deck, and navigation is
accomplished by reference to electronic signals.

Question 20

Instrument Landing System (ILS)

Answer 20

An electronic system
that provides both horizontal and vertical guidance to a
specific runway, used to execute a precision instrument
approach procedure.

Question 21

Instrument Meteorological Conditions (IMC)

Answer 21

Meteorological conditions expressed in terms of visibility,
distance from clouds, and ceiling less than the minimums
specified for visual meteorological conditions, requiring
operations to be conducted under IFR.

Question 22

Instrument takeoff

Answer 22

Using the instruments rather than
outside visual cues to maintain runway heading and execute
a safe takeoff.

Question 23

Intercooler

Answer 23

A device used to reduce the temperatures of the
compressed air before it enters the fuel metering device. The
resulting cooler air has a higher density, which permits the
engine to be operated with a higher power setting.

Question 24

Interference drag

Answer 24

Drag generated by the collision of
airstreams creating eddy currents, turbulence, or restrictions
to smooth flow.

Question 25

International Civil Aviation Organization (ICAO)

Answer 25

The
United Nations agency for developing the principles and
techniques of international air navigation, and fostering planning
and development of international civil air transport.

Question 26

International Standard Atmosphere (IAS)

Answer 26

A model of standard variation of pressure and temperature.

Question 27

Interpolation

Answer 27

The estimation of an intermediate value
of a quantity that falls between marked values in a series.
Example: In a measurement of length, with a rule that is
marked in eighths of an inch, the value falls between 3/8
inch and 1/2 inch. The estimated (interpolated) value might
then be said to be 7/16 inch.

Question 28

Inversion

Answer 28

An increase in temperature with altitude

Question 29

Inversion illusion

Answer 29

The estimation of an intermediate value
of a quantity that falls between marked values in a series.
Example: In a measurement of length, with a rule that is
marked in eighths of an inch, the value falls between 3/8
inch and 1/2 inch. The estimated (interpolated) value might
then be said to be 7/16 inch.

Question 30

Inverter

Answer 30

A solid-state electronic device that converts D.C.
into A.C. current of the proper voltage and frequency to
operate A.C. gyro instruments.

Question 31

Isobars

Answer 31

Lines which connect points of equal barometric pressure.

Question 32

Isogonic lines

Answer 32

Lines drawn across aeronautical charts to

connect points having the same magnetic variation.